import globalStore from './store'
import XEUtils from 'xe-utils'

let provincesPromise: any

export function getProvincesJSON (): Promise<any[]> {
  if (provincesPromise) {
    return provincesPromise
  }
  if (globalStore.provincesPicker && globalStore.provincesPicker.jsonUrl) {
    provincesPromise = new Promise((resolve) => {
      uni.request({
        url: globalStore.provincesPicker?.jsonUrl || '',
        method: 'GET',
        dataType: 'json',
        success (res) {
          resolve(XEUtils.isArray(res.data) ? res.data : [])
        },
        fail (e) {
          provincesPromise = null
          resolve([])
        }
      })
    })
  } else {
    provincesPromise = Promise.resolve([])
    console.error('缺少全局配置：provincesPicker.jsonUrl')
  }
  return provincesPromise
}